What is converted
A dated India Standard Time is resolved to one UTC instant and displayed in Singapore Time.
IST to Singapore Converter
Use the IST to Singapore Converter to convert India Standard Time to Singapore Time. Convert India Standard Time to Singapore Time with the exact 2 hour 30 minute difference, current clocks, and calendar rollover shown clearly.
Current conversion
Right now in both time zones
India Standard Time ISTNov 3, 2026 · UTC+05:30
Singapore Time SGTNov 3, 2026 · UTC+08:00
Singapore Time is 2 hours 30 minutes ahead of India Standard Time. The converted time is on the same calendar date.
Singapore Time
Enter your values, then calculate to see a verified result.
Reference range
How this result is calculated
A clear calculation path based on your inputs.
Inputs usedReview the information used for this result.
Full calculation and sourcesReview the equation, normalized inputs, assumptions, and version.
Versioned calculationFormula v5.0.0
Offset relationship
IST remains UTC+05:30 and Singapore Time remains UTC+08:00, so Singapore is always 2 hours 30 minutes ahead.
Important distinction
IST means India Standard Time in this converter.
Choose the India dateUse the date attached to the source time.
Sep 16, 2026Enter India timeUse local India Standard Time.
9:00 AMRead Singapore time and dayCheck the time and explicit date relationship.
11:30 AM SGT, same dayInterpretation
represents the same instant as the India input.
Use the rollover label before scheduling a late-evening India event.
The meeting suggestions keep both local times inside the stated working-hours window.
Continue with your result
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Report a calculation issue IST to Singapore Converter: purpose and method
India Standard Time to Singapore Time conversion with selected-date zone rules, minute precision, and explicit calendar rollover.
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Method and test recordFormula v5.0.0
- Recorded scope
- Time-zone conversion, rollover, historical offset, and meeting-planner review
- Publisher
- CalculatorGeek
- Reviewed by
- CalculatorGeek Editorial Team
- Recorded review date
- 2026-09-16
- Next source review
- 2027-03-16
- Definition fixtures
- 5 configured scenarios
- Published examples
- 3 shown below
Recorded method
The legacy generated converter and five current competitors were inspected, current offsets were checked against CSIR-NPL and Singapore legislation, and the shared IANA implementation was tested for deterministic, historical, rollover, reciprocal, timeline, third-zone, duration, export, keyboard, table, and responsive behavior.
These records describe the published model and reference tests. A test-case count is not a certification of every possible input or an independent specialist review. Editorial policy
Known limitations
- IST means India Standard Time on this page, not Irish Standard Time or Israel Standard Time.
- The browser supplies IANA time-zone data; very old dates can vary with the time-zone database bundled by the browser or operating system.
- The meeting window assumes 9:00 AM to 5:00 PM in both zones and does not account for holidays or individual schedules.
- Calendar exports use the converted UTC instant and a default one-hour duration.
Method sources
- CSIR-NPL India - Indian Standard Time
- Singapore Statutes Online - Singapore Standard Time Notification
- IANA Time Zone Database
Latest model update
2026-09-16 -
Reference inputs and expected results
These published examples are separate from the configured definition fixtures and any additional automated assertions. Expected values use the stated output units; invalid inputs are intended to be rejected.
| Case | Inputs | Expected result |
|---|---|---|
| Morning | 9:00 AM IST, Sep 16 2026 | 11:30 AM Singapore, same day |
| Midnight boundary | 11:00 PM IST, Dec 31 2026 | 1:30 AM Singapore, Jan 1 2027 |
| Historical rule | 10:00 IST, Jan 15 1980 | 12:00 Singapore because Singapore was UTC+07:30 |
Report an issue with this tool. Include the page URL, units, expected answer, and steps to reproduce. Do not include sensitive personal information.
On this page
IST to Singapore: direct answer
Singapore Time is 2 hours 30 minutes ahead of India Standard Time throughout the year. Add 2 hours 30 minutes to an IST time and carry any next-date rollover shown in the result. Reverse the direction with the Singapore to IST Converter, or compare all reviewed routes in the time-zone converter hub.
How the conversion works
The calculator resolves the selected India date and time with the IANA identifier Asia/Kolkata, converts it to a UTC instant, and formats that same instant with Asia/Singapore.
Current-date shortcut: Singapore Time = IST + 2 hours 30 minutes.
When the result moves to the next day
India times from 9:30 PM through 11:59 PM normally convert to the next calendar day in Singapore. An India time of 11:00 PM on December 31 is 1:30 AM in Singapore on January 1. The result panel shows this rollover explicitly.
Common India to Singapore times
| India (IST) | Singapore | Day |
|---|---|---|
| 8:00 AM | 10:30 AM | Same day |
| 12:00 PM | 2:30 PM | Same day |
| 5:00 PM | 7:30 PM | Same day |
| 11:00 PM | 1:30 AM | Next day |
Plan India and Singapore meetings
With a 9:00 AM to 5:00 PM workday in both places, the shared window is 9:00 AM to 2:30 PM in India and 11:30 AM to 5:00 PM in Singapore. The visual planner aligns both 24-hour timelines, can add a third timezone, preserves five-minute selections, and exports the chosen duration to Google Calendar or an ICS file. For time sheets or project records, convert the session length with the Decimal Hours Calculator.
Historical dates and daylight saving time
India and Singapore do not currently observe daylight saving time. Singapore used UTC+07:30 before 1982, so archival conversions can differ from the modern 2-hour-30-minute relationship. The selected-date engine preserves that history.
What IST means here
IST is ambiguous internationally. It can refer to India Standard Time, Irish Standard Time, or Israel Standard Time. On this page, IST always means India Standard Time (UTC+05:30) and uses Asia/Kolkata. If you intended a different location or abbreviation, choose a location-specific route from the time-zone converter hub.
Inputs, outputs and result meaning
India Standard Time to Singapore Time conversion with selected-date zone rules, minute precision, and explicit calendar rollover.
Inputs
- Date in India
- The selected date controls the applicable IANA time-zone rules.
- India Standard Time
- Enter a local wall-clock time in India.
- Display format
- Choose how times appear in the result and conversion table. Available choices are 12-hour clock and 24-hour clock.
Outputs
- Singapore Time
- This is the primary result. It is displayed in SGT. The selected display mode formats the result as a clock time. It appears only when the selected mode supports this result. The same result may be available in another supported unit or display mode.
- Singapore relative to IST
- It is displayed in h. The visible value uses up to 2 decimal places according to the output rule.
- India UTC offset
- It is displayed in h. The visible value uses up to 2 decimal places according to the output rule.
- Singapore UTC offset
- It is displayed in h. The visible value uses up to 2 decimal places according to the output rule.
Resolve the India wall time in Asia/Kolkata, convert that instant to UTC, then format the same instant in Asia/Singapore. Keep the result label, unit, selected mode, and stated limitations together when sharing the answer.
Frequently asked questions
Is Singapore ahead of IST?
Yes. On current dates, Singapore is 2 hours 30 minutes ahead of India Standard Time.
Does the difference change during the year?
No for current rules. Neither India nor Singapore currently observes daylight saving time.
What is 8:30 PM IST in Singapore?
It is 11:00 PM in Singapore on the same day under current offsets.
Can I use the converter for an old date?
Yes. The browser's IANA time-zone data is used, so historical Singapore offset changes can be represented.
Should I use the abbreviation or a city or region?
Use the full location or configured IANA zone when an abbreviation could identify more than one place. This page states exactly how IST and SGT are interpreted.
What happens during a skipped or repeated local time?
A spring-forward time that never occurs is rejected. When a fall-back transition repeats a clock time, the converter exposes the earlier or later occurrence instead of silently guessing.
Primary sources
Indian Standard Time was checked against the CSIR-National Physical Laboratory. Current Singapore time was checked against Singapore Statutes Online. Historical and selected-date behavior uses the browser's implementation of the IANA Time Zone Database.
Choose date-aware time or a fixed UTC offset
This route resolves India Standard Time through Asia/Kolkata. The selected date determines the applicable UTC offset before the same instant is formatted in Singapore Time.
| Source meaning | Best for | Result behavior |
|---|---|---|
| Date-aware regional time | Meetings, travel, events, deadlines | The UTC offset can change with the selected date; rollover is shown. |
| Fixed UTC offset | Technical timestamps and explicitly stated offsets | The stated offset stays fixed; the target clock and date are calculated from it. |